If the original drivetrain wasn't used then yes. A fine example is the Kaizo R34 buggy with a VW engine (used in F&F) which was not seized by ICE agents during the raid. A reconstructed vehicle using a different motor/tranny not offered for that vehicle, again... that's what Kaizo offered but what landed Daryl in trouble was putting the same motors back in the cars and hooking up the customers.